1results about How to "Solve the jam situation" patented technology

This application relates to a method for preparing a toughened, low-shrinkage unsaturated polyester resin bulk molding compound. The bulk molding compound is extruded using a screw extruder. The screw extruder includes a frame, an extrusion module, and an extruder head. The extruder head is equipped with a filter structure, which includes a filter screen with a plurality of filter holes and a drive component. The filter screen is installed inside the extruder head and is rotatable. The drive component includes a toothed ring fixed to the filter screen and a drive gear driven by a motor installed outside the extruder head. One side of the toothed ring is exposed outside the extruder head, and the drive gear meshes with the toothed ring. This application uses a drive gear to drive the rotation of the toothed ring, thereby causing the filter screen to rotate inside the extruder head. This solves the problem of a fluid dynamic "dead zone" easily forming in the contact area between the filter screen edge and the inner wall of the extruder when using a fixed filter screen structure, reducing the possibility of scorching caused by the retention of high-viscosity thermosetting materials.